Shoutout Grunt. Fixes documentationjs#11

Author: tmcw

index.html

@@ -108,7 +108,7 @@
         <a href='https://github.com/documentationjs/documentation#user-guide'>CLI</a>
         + Node.js</li>
         + <a href='https://github.com/documentationjs/gulp-documentation'>Gulp</a>
-        + <a href='https://github.com/documentationjs/dev-documentation'>Developer Tools</a>
+        + <a href='https://github.com/documentationjs/grunt-documentation'>Grunt</a>
       </span>
     </div>
     <p class='py2'>